The bad news continues for Carlton as they labour through a horror season with the announcement that star defender Andrew Walker will undergo knee surgery and not play again this year.

Carlton football director Andrew McKay said on the club website that Walker had struggled with an injury for several weeks. "Andrew's knee has been troubling him for a significant amount of the season, but to his credit he has managed to play through the pain and make a solid contribution for our team," McKay said.

"While we have reduced Andrew's training load and managed the injury as best we can, we believe it's his best interests to have an arthroscope now to ensure it doesn't get any worse."